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Oxidation of SO 2 on the surface of fly ash particles under low relative humidity conditions
Author(s) -
Mamane Yaacov,
Pueschel Rudolf F.
Publication year - 1979
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl006i002p00109
Subject(s) - fly ash , relative humidity , sulfate , dispersion (optics) , sulfur , atmosphere (unit) , plume , coal , environmental chemistry , environmental science , materials science , mineralogy , chemistry , metallurgy , meteorology , composite material , physics , organic chemistry , optics
Submicron fly ash particles can accumulate sulfate by surface oxidation of SO 2 in amounts between 9% and 45% of their mass at residence times between 0.3 and 12.5 hours at low humidities in the plume of a coal‐fired power plant. The accumulation is size dependent and rapid decrease in the amount of fly ash due to fallout and dispersion prevents efficient removal of sulfur from the atmosphere by this mechanism.